Automatic regulator



I 1,624,039 Apnl 12, 1927. L DANA AUTOMATI C REGULATO R Filed June 4, 1926 Patented Apr. 12, 1927.

UNITED "STATES.

PATENT OFF-ICE.

, Lnsnm Dana, or s'rJ-nopIs, mssonm.

avroxarro REGULATOR.

Application filed June 4, me. Serial in. 113,696.

This invention relates to automatic damper regulators for stoves, vfurnaces and heating apparatus generally, more particularly for coal or other solid fuel heating apparatus for rooms, dwellings and small uildings, of the type shown in my prior patent granted tome on December 30, 1924, No. 1,521,436.

My invention aims to improve generally such devices by-providing a simple, reliable v and eflicient automatic regplatorcapable of controlling both the dampers. I

Furthermore, the automatic control of one or both of the check and draft dampers eck and draft makes it desirable to lock the regulator so.

vention appear hereinafter in connection with the escription of the embodiment thereof shown in the accompanying drawings, wherein v 'Fi 1 .is a side elevation of my improved regu ator applied to an ordinary domestic A render the thermostatic element inoperaheater;

Fig. 2 is a rear elevation of the regulator and aportion of the heater, looking at 1t from the right of Fig. 1, and

Fig. 3 is a detail vertical sectional view of v the regulator illustrating the check damper latched in open position in full lines and in closed position in dotted lines.

Figure 4-is adeta'iled -pers ective View of the night latch .and associate mechanism.

In the illustrative embodiment of the invention shown 'inthe drawings, a thermal .re lator of the bimetallic type is shown appied to the check dam r 10, which is inged to o n. downwar ly by gravity on the flue 11 of an ordina room type heater 12 having a bottom dra damper 13 of usual form, located preferably on the rear side of the heater so as to be in vertical alignment with the check damper 10, as shown in %he' automatic regulator for the check damper ma of any suitable construction, but pi'efera 1y is of the type shown and described .in my prior Patent, 'No. 1,521,436,

- wardly,

ower e ge of an opening into the outlet =rality of at, flexible, metallic elements, hav-" ing different coeflicients of expansion, secured to each other and suitably mounted in the lower portion of the housing. 14 for,

adjustment of their tension, as by means of ascrew 20, and arranged to hear at theirfree ends against the roller 21 on the crank .arm 18, so that under nOrmaltem rature conditions the tension exerted-b t e thermostat against the crank arm W111 hold the check damper 10 in closed position. 1

In my improved construction, the end of the'crank arm 18 is suitably formed, as for lnstance, with an eye, 22, to receive the ho oked u per end of the connectiomrod 23, i

connecte at its lower end to the draft damper 13. As is obvious,"this construction permits the draftdamper 13 to be closed as the check damper 10 is opened, thereby provldmg a more effective control for thest'ove. In-order to latch the check damper 10 open and thedraft damper-13 closed, and

tive, I have provideda night? latch member 24 pivotally mounted on suitable journals or trunnieris 25 in the housing 14, and

having a laterally ofiset handle portion 26;

and a crank ortion-27. The crank portion 27 of the nlght latch referably overlies" the crank portion 18 of t e operating member 17 so that when thehandle portion 26 is moved downwardly (as shown in Fig. 3)

the operating member and thermostat elements will be forced rearw'ardly and down permitting the check damper.1O to open an closing the draft damper 13. in this position the latch 24 locks the crank arm 18 and check damper. 10 in open position with the thermostat in inoperative po- 'sition-so that it cannot operate to-control the dampers 10 and 13. When the handle member 25 of the latch is moved to its normal position(as shown in dotted lines in Fig. 3) the tension-of the thermostat'a'cb ing upon the crank member 18 closes the check damper 10 and opens the draft damper 13. In this-position the thermostat is- 1 operativeto control thedampers 10 and13 variety of heating apparatus'as well as a such as clocks and thelike.

wide range of automatic control devices Furthermore, it is simple in construction, reliable in operation and not easily broken or deranged. It is an efficient attachment for the purpose of economizing in the consumption of fuel, and for preventing overheating ofigthe apparatus and attendant liability of causing fire; and for maintaining a substantially .uniform temperature in the building when desired.

Obviously my invention is not restricted to the details or the illustrative arrangement shown.

I claim:

1. A regulator for. stoves, furnaces and,

' the like, having check and draft dampers,=,

comprising .an operating arm associated with one of said dampers, a flexible thermostat element positioned to engage said arm, means connecting said dampers for sithe like, having a check damper pivoted so I that it will be opened by gravity and a draft damper p-ivotedso that it will; close by gravity, with means connecting said dampers together for simultaneous operation to reversed positions, comprising a counterweighted crank arm secured to one of said dampers and movable therewith, a bending bi-metallic thermostat positioned to engage said arm and adapted in its normal position to hold, the check damper closed and the draft damper open, and latch means for locking said thermostat out of its normal position, thereby permitting the check damper to open and the draft damper to close.

5. A regulator for stoves, fur aces and the like, having check and draft mpers, connected together for simultaneous operation to reversed positions, comprising an operating arm associated with said check damper, a thermostat element positioned to directly engage said arm and adapted in its normal position to hold. the check damper closed and g the draft damper open, a housing surround- ;ing said operating arm and thermostat, and

a. latch member pivotally mounted on said housing and having a portion engaging said arm whereby said latch member may be operated to move said thermostat out of its normal position thereby to lock said check multaneous operation, and latch means po-fldamper openand said draft damper closed.

sitioned for engagement with said arm for, locking said thermostat element in a posi-- tion Where it will be ineffective to control; said dampers. i

2. A regulator for stoves, furnaces and the like, having check and draft dampers connected together for simultaneous operation to reversed positions, comprising an operating arm associated with one-of said.

dampers, a thermostat element positioned to directly engage saidarm and adapted in its normal position to hold the'check damper closed and the draft damper open, and latch means operative at the will of the operator adapted to engage said arm for locking said thermostat out of its normal position with the check damper open and the draft damper closed.

3. A regulator for stoves, furnaces and v the like, having check and draft dampers connected-together for simultaneous operation to reversed positions, comprising an operating arm associated with said check damper, a thermostat element positioned to directly engage said arm and adapted in its normal position to hold the check damper closed and the draft damper open, and pivoted latch means operative at the will of the operator and having a locking portion. engaging said arm for locking said thermostat out of its normal position with the 'checkdamper open and the draft damper closed.

4. A regulator for stoves, furnaces and 6. A regulator for stoves, furnaces and the like, having a check damper pivoted so that it will be opened by gravity and a draft damper pivoted sothat it will close by gravity, with means connecting said dampers together for simultaneous operation to reversed positions, comprising a counter-' weighted crank arm secured to said .check damper and movable therewith, a bending bi-metallic thermostat positioned to engage said arm and adapted in its normal position to hold the check damper closed and the draft damper open, and pivotally mounted latch means having a portion engaging said arm,- locking said thermostat out of its nor mal position, thereby permitting the check damper to open and the draft damper to close.

7. A regulator for'stoves, furnaces and the like, having check and draft dampers, an operating crank arm on said check damper and movable therewith, and a bending thermostat secured at one endbelow said check damper and having its free end engaging said crank arm, and a connecting rod pivotally connected with said crank arm and draft damper said crank arm, an eye formed on said rod 23 connecting said arm 18 and draft crank arm, and a connecting rod pivotally .damper 13 whereby said dampers may beconnected 'with said eye and said draft operated simultaneously to reversed posidamper for operating said check and draft tions, and a night latch 24 adapted to engage dampers in reverse directions. said arm 18 to hold said check damper open 5 9. A regulator for stoves, furnaces and and said draft damper closed and said therthe like, having a check damper 10 and draft mostat out of its normal position. I

damper 13, and operating crank arm 18 In testimony whereof, I have signed my connected with said check damper, a thermoname to this specification.

stat 16 engaging said arm 18, a connecting LESLIE DANA. 

